An experimental and theoretical study of unsteady heat transfer during piston compression
Abstract
The unsteady heat transfer from a gas to a surface during piston compression was discussed. To determine the wall heat flux a thin film resistance thermometer was used. Another determination of the heat flux was obtained from the solution of the conservation equations in the gas boundary layer near the wall. This analysis used the isentropic compression relation for the bulk gas outside the boundary layer. The results for the heat flux obtained from these two independent methods, one based on the solid, the other on the gas, were in good agreement. This agreement was obtained for measurements in air and in argon, and for gauges that were placed at either the end wall or the side wall. Results were also obtained for the heat transfer coefficient and a non-monatonic variation with respect to time was observed and discussed.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1977
- Bibcode:
- 1977PhDT........23N
- Keywords:
-
- Compressed Gas;
- Heat Transfer;
- Pistons;
- Fluid Dynamics;
- Heat Flux;
- Unsteady Flow;
- Fluid Mechanics and Heat Transfer